package main

import "fmt"

func main() {
	var a map[string]string
	a = make(map[string]string)
	a["a"] = "av"
	a["b"] = "bv"
	for k := range a {
		fmt.Println(k)
	}

	for k, v := range a {
		fmt.Println(k, v)
	}
	aValue, aok := a["a"]
	fmt.Println(aValue, aok)
	cValue, cok := a["c"]
	fmt.Println(cValue, cok)

	delete(a, "a")
	for k, v := range a {
		fmt.Println(k, v)
	}

}
